Carbureter.



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'Gamma l Vvinto the nozzle H through which the oil is t into the mixing chamber. ,l

ling lowering of the-head L carryin M, causing the -llead L to be -drawn downward against the;tension of the spring P at the same time that the nozzle H is moving upward withI the piston G. ,This will produce a sudden increase in the area of opening permitted to pass, which will .cause a corresponding increase in the amount discharged Vhen the metering-Lpin is thus adjusted the closing of the check valve Q will prevent the instantaneous returnjo said pin, even where the air valve is permitted to' drop, but thel gradual leakage of oill around the heads L and L will permit the slow return movement of the meteringpin under the actuating pressure lof the springP. Thus it is apparent that the cylinder F and piston G coperate to form a dash-pot acting to resist any sudden opening of the valve I, and it is further apparent that the suction 'of said dash-pot, when the piston Gr is suddenly raised, will act to increase the flow of liquid fuel.

i In the operation of the carbureter Whenever the throttle -valveC is quickly thrown open the lowering of pressure in the mixing chamber' B lwill I by the atmospheric pressure-of air inthe chamber J. There is not, however, the same tendency for the valve I to jump to its extreme position, as with the case of constructions oi' thisv typeleretofore used. This is probablydue to the fact that the head L is freely movable and is resisted only by the tension of the comparatively light spring lP, so that the oil beneath this head is displaced toy compensate for the displacement of Ithe piston Gr, Thus there is not the same initial resistance to the movement of the piston G, and thisprevents thev extreme diiierential p ressurenpon the air valve I which would occur if that vvalve wereheld temporarily upon "ltsfseat f In otherwords, with the constructions'cprevi'ously used the temporary holding ofthe air valve toits seat causes a.

much higher vacuum inthe mixing chamber,

with a result that when 'the lvalve does move .it acquires a high velocity which shoots it beyond helpoint at which the air pressures balancepf.

The opening of the air valve I causes the displacement of the piston G and the rsultmetering pin K, which, by increasing the entrance orifice for the oil in the nozzle H, permits'of a corresponding increase in the discharge in the mixing chamber. The check valve Q is lifted during the downward movement of the head L so that the oil-therebeneath may be displaced into the cylinder F, but the instantaneous closing of said check valve will prevent the return movement so that the metering pin remains in lowered position. Thus the increased flow of oil through the nozzle continues for a period of cause the rise of the valve the discharge of. oil,

theI

-time determined by "the pressure of` the spring P and the leakage 'of oil about the heads L and L', and this ma be made sufficiently long to insure a prgier proportion of oil with the air during a quick pick up.

When the throttle valve C is opened or closed, gradually the leakage of the oil about the piston G and the heads L and L will prevent the downward displacement of the metering pin, but the upward movement of the piston G will effect a relative movement of the nozzle H and the metering pin to increase the flow of oil.

What I claim as my invention is 1. In a carbureter, the combination with a casing containing the mixing chamber, of avalve controlling the air inlet to said chamber, a nozzle for discharging oil into said chamber, means controlled by the movement of the air inlet valve for varyingthe discharge of oil, and means operating upon the sudden opening of said air valve for maintaining a temporary increase in the discharge of the oil independent ofthe positionof said air valve subsequent to its sudden movement.

2. In a carbureter, the combination with the casing containing the mixing chamber,

.of a valve controlling the air inlet to said said increased discharge.

3. In a carburetor, the combination with a casing and mixing chamber, of a valve controlling the air inlet into said chamber, a nozzle for discharging'oil into said chamber, means operated by the normal movement of said air valve for proportionately varying and means operated by a lsudden opening' of said air valve for ab,- normally increasing the discharge of oil andv gradually diminishingsaid discharge to the normal rate. 1

4. AIn a carbureter, the combinatipngwith a casing having a mixing chamber, it valve controlling the air inlet yinto saidqizhamber, a nozzle for discharging oil into said' chamber, a .metering pin for varying the discharge of oil automatically ating upon a' sudden,k opening of said air valvefor abnormally ladjusting said meteringl pin to increase and temporarily maintain an increased dischargeof oil.

`5.` Ina carburetor, theicombination with a nasing containing a mixingchamber, a nozzle for discharging oil intosaid chamber, "a valve controlling the air inlet into said chamber, a. metering pin controlling the oil discharge from said nozzle, means operated by charge of oil and temporarily continuing A I adjusted by the l movement of said air valve, and means oper-- the normal movement of said air valve for 6. In a carbureter, the combination with a casing containing the mixing'chamber,*of an automatic valve controlling the air inlet to said chamber, a nozzle for discharging the liquid fuel into said chamber, a. dash pot for resisting the sudden opening of said air inlet valve, and means operated by the suction of said dash pot for increasing the flow of liquid fuel.

7. In a carbureter, the 'combination with a' casing containing the mixing chamber, of an automatic valve controlling theair inlet to said chamber, a nozzle for discharging liquid fuelinto said chamber, a dash pot for resisting the sudden opening of said automatic valve, a metering pin for vari-ably restricting the flow of liquid fuel to said nozzle, and means operated by the suction of said dash pot for adjusting said metering pin to increase the flow of liquid fuel.

8. ,in a carbureter, the combination with a casing containing the mixing chamber, of an automatic valve controllingthe air inlet to said chamber, a nozzle for discharging the liquid fuel into said chamber, a dash pot for resisting the sudden opening of said automatic valve, a metering pin for variably restricting the flow of liquid fuel to said nozzle in dilferent positions of adjustment of said automatic valve, means operated by the suction of said dash-pot for adjusting said metering pin to further increase the flow of liquid fuel, and means for restoring said metering pin to normal position upon the cessation of the suction of'said dasli-pot.

S). ln a carbuieter, the combination with a casing containing the mixing chamber, of an automatic valve controlling the air inlet to said chamber, a nozzle for discharging the liquid fuel into said chamber, a piston connected to said automatic valve, a cylinder in which said piston is arranged coperating therewith to form a dash-pot for resisting the sudden opening of said valve, a meter ingr pin, a piston in which said metering pin is mounted, a cylinder for said piston connected with the cylinder of said dash pot, whereby the metering pin is shifted by the suction of the dash pot, and means coperating with said metering pin for variably restricting the flow of liquid-fuel with each position of adjustment of said automatic valve and for further increasing the flow upon the actuation of said metering pin by the suction of said dash pot.

l0. In a carbureter, the combination with a casing containing a mixing chamber, of a nozzle for discharging oil into said chamber, a metering pin limitingr the fuel supply to the nozzle, and means operating upon an increase in the velocity of air passing through said chamber for simultaneously displacing the nozzle and metering pin oppositely'.

l1. In a carburetcr, the combination with a casing containing a mixing i'fliamber, of a nozzle for discharging oil into said chamber, a metering pin limiting the supply of oil to the nozzle, means for manually adjusting the metering pin relative to the nozzle, and means operating upon a change in the velocity of air passing through the mixing chamber for displacing the metering pin to vary the fuel supply.

l2. In a carburetor, the `combination with a casing containing a mixing chamber, of a nozzle for discharging oil into said chamber, means for normally proportioning thev supply of fuel to the `velocity of air passing through the mixing chamber, and means operating upon a sudden increase in the velocity of air passing through the mixing chamber for abnormally increasing the discharge of oil and gradually diminishing said discharge to the normal rate.

In testimony whereof I atx my signature in presence of two witnesses.

OTIS C. FUNDERBURK.

l/Vitnesses:

JAMES l). Banni', HENRIETTE E. BOWMAN. 

